Button Operations

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	Practical Programming in Tcl & Tk, Third Edition By Brent B. Welch
	Table of Contents
	Chapter 27.  Buttons and Menus

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Table 27-2 summarizes the operations on button widgets. In the table, $w is a button, checkbutton, radiobutton, or menubutton, except when noted. For the most part, these operations are used by the script libraries that implement the bindings for buttons. The cget and configure operations are the most commonly used by applications.

Table 27-2. Button operations.

$w cget option	Returns the value of the specified attribute.
$w configure ?option? ?value? ...	Queries or manipulates the configuration information for the widget.
$w deselect	Deselects the radiobutton or checkbutton. Set the radiobutton variable to the null string. Set the checkbutton variable to the off value.
$w flash	Redisplays the button several times in alternate colors.
$w invoke	Invokes the command associated with the button.
$w select	Selects the radiobutton or checkbutton, setting the associated variable appropriately.

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